A Tucson-based nonprofit organization that supports the region's national parks is celebrating its 80th anniversary this weekend.

From 10 a.m. to 5 p.m. Saturday, July 21, the Western National Parks Association is hosting an anniversary celebration at its National Parks Store, located at 12880 N. Vistoso Village Drive in Tucson. Cake and coffee will be served, and all visitors will receive a free gift with any purchase.

The WNPA has been a nonprofit education partner of the National Park Service since 1938. Purchases at the store are tax-free and support parks across the western United States.

To learn more, visit the National Parks Store website.